This spy was named the worst in American history from a damage point of view.
His wife was my daughter's homeroom teacher at an extremely conservative (Opus Dei) girls' Catholic school at the time of his arrest. I did mention to her a few months later at a school play some of the advantages to being a single parent, e.g., always having for dinner what YOU want for a change. She thought about it for a minute and said, you know, you're right...I could see an awakening...she just retired a few years ago and he died in prison. I wish her every happiness...
https://en.wikipedia.org/wiki/Robert_Hanssen